[dgramalho]

Hi guys. I've been reading about the adaptor for 645\645n. I have a 55mm 3.5 for 645n, but now I need to use it with my new 67 system. Is there any adaptor for it?

[LaHo]

Hi guys. I've been reading about the adaptor for 645\645n. I have a 55mm 3.5 for 645n, but now I need to use it with my new 67 system. Is there any adaptor for it?

No. You can mount a 67 lens on a 645 camera or 67 and 645 lenses on a 35mm camera, but I don't think that it is possible to mount a 645 lens on a 67 camera. The image circle of a 645 lens will not cover the full 67 negative, and the registration disctance of a 645 lens is too short to achieve infinity on a 67 camera.

[The Madshutter]

No. You can mount a 67 lens on a 645 camera or 67 and 645 lenses on a 35mm camera, but I don't think that it is possible to mount a 645 lens on a 67 camera. The image circle of a 645 lens will not cover the full 67 negative, and the registration disctance of a 645 lens is too short to achieve infinity on a 67 camera.

Second that. Not possible to use a 645 lens on 67 as far as I know.

[mikeSF]

i found this to be a legitimate issue with my 67 M*300 on the 645D, so i simply dipped a small art brush in some flat black spray paint(sprayed into the cap), and painted a light coat on the shiny anodized black surfaces of the adapter and the problem went away 100%. it took me 2 years to get around to doing something that took 15 minutes. thanks for the tip!

there is one more issue i've encountered. The three exterior screws wiggle loose over time and can introduce a wobble to the mounted lens. For my 300 tele, it was enough to soften the image. Just periodically tighten those screws or apply some thread lock and you'll be fine. I thought my tripod head was the culprit and spent a good deal of time searching in the wrong direction.